Centrifugal separator



July 8, 1930.

Filed Oct. 15, 1929 7(a)! 470/2572 Lire/mack:

Arrow 576i Patented July 8, 1930 UNITED STATES PATENT OFFICE:

KARL JOHAN SVENSSON, OF ALSTEN, SWEDEN, ASSIGNOR TO THE DE LAVAL SEPA- RATOR COMPANY, OF NEW YORK, N. Y.,' A. CORPORATION OF NEW JERSEY CENTBIIIEUGAL snrnm'ron.

Application filed October 15, 1929, SeriaLNo. 339,758, and in- Sweden November 3', 19s.

The present invention comprises the combination, with a separator bowl, of a frame provided with or carrying a ffixled conduit for the liquid to be suppliedto t e separator, a

' 5 fixed conduit for conveying away liquid discharged from the separator, a collecting ves-- sel hinged to the frame or one of said conduits and provided with a supply channel and a discharge channel adapted, when the 001- lecting vessel is closed, to register with the fixed supply conduit and fixed discharge conduit respectively, and means, operative at the interruption of the supply of liquid and the opening of the collecting vessel, to prevent the liquid remaining in said supply channel from streaming out of the channelform a casing enclosing the lower part of the bowl.

Hinged at c is a collecting vessel comprising a cover d, a casing e enclosing the upper part of the bowl, and a conical pan f adapted to receive separated or purified liquid discharged from the bowl.

At one side of the frame I) is supported a fixed conduit 9 adapted to carry away liquid discharged from the separator bowl onto the pan 6. The collecting vessel carries a tube 72. communicating with the pan 7 and adapted, when the collecting vessel is swung down on its hinge a into a closed position, to register with the conduit 9. I

At the other side of the frame b is supported a fixed conduit 21 through which the supply liquid is conveyed upward, under pressure, into a feed channel carried by the collecting vessel. This feed channel comprises a passage is formed in the cover of the collecting vessel, a nozzle m which feeds-the liquid di- .5 rect into the'separating space of the bowl a,

and a tube which, when the collecting vessel is closed, registers with the fixed conduit 6.

When, in the operation of the machine, so

far as it is above described, the supply is interrupted, a certain amount of liquid remains in the supply channel. Without, safeguarding means this liquid would stream outover the separator upon lifting the collecting vessel. This action, however, is avoided, in the construction embodyingmy invention, by the provision of an automatic valve in the feed channel. The valve structure is preferably located at the lower end of the tube j. It may have any suitable construction. As shown it comprises a valve seat 0, a valve ;0 whose stem is slidable in a support or guide 1- and a coil spring 8 surrounding the'valve stem and confined between the guide 1" andthe valve head.

The tension of the spring is such as to be readily compressible by. the normal pressure in the feed line while liquid is being fed to the separator; but when that pressure is released,

'or drops below a predetermined limit, the

valve automatically closes, thus preventing the escape of any liquid in the tube when the collecting vessel is swung up intoopen position.

The described valve structure is particularly suitable when considerable pressure is available, as, for example, that produced by a pump. If the pressure is light, the valve may-be arranged for'manual operation and is closed before raising the cover. Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1.. The combination with a centrifugal sep? arator bowl, of a liquid supply conduit whose outlet end opens upward, a collecting vessel inhinged relation with the supply conduit and provided with a feed channel whose inlet end is between the axis of its hinge and its opposite free end and which is adapted toregister with-the outlet end of the supply conduit when the collecting vessels is moved down into closed position and to recede from the outlet end of the supplyconduit when the collecting vessel is moved up into openposition, and a valve controlling the flow of liquid through the feed channel, said valve being carried-wholly by the collecting vessel. 2. The combination with a centrifugal separator bowl, of a liquid supply conduit whose outlet end opens upward, a collecting vessel in hinged relation with the supply conduit and provided with a feed channel -whose inlet end is between the axis of its hinge and its opposite free end and which is adapted to register with the outlet end 5 of the supply conduit when the collecting vessel is moved down into closed position and to recede from the outlet end of the supply conduit when the collecting vessel is moved up into open position, and a normally closed valve controlling the flow of liquid through the feed channel, the valve being carried by the .Vcollecting vessel and positioned at the inlet end of the feed channel and adapted to be opened, when the collecting vessel is lowered into closed position, by the pressure of the incoming feed liquid, and closing when the collecting vessel is lifted into open position.

3. The combination with a centrifugal separator bowl, of a liquid supply conduit whose outlet end opens upward, a collecting vessel in hinged relation with the supply conduit and provided with a feed channel whose inlet end is between the axis of its hinge and its zsopposite free end and which is adapted to register with the outlet end of the supply conduit when the collecting vessel is moved down into closed position and to recede from the outlet end of the supply conduit when the collecting vessel is moved up into open position, and a valve controlling the flow of liquid through the feed channel, the valve spring being actuated and thereby normally closed whether the collecting vessel is in open or closed position and adapted to open against the force of its spring, only when the pressure of the supply liquid exceeds the Sp2ln% pressure.

he combination with a centrifugal sep- 40 arator bowl, of a liquid supply conduit whose outlet end opens upward and a liquid dischartge conduit whose inlet end opens upwar a collecting vessel provided with a feed channel and a discharge channel both opening downward and adapted, when the collecting vessel is moved down into closed position, to cause the said channels to register respectively with the supply conduit and the discharge conduit and adapted, when the collecting vessel is moved up into open posi- I tion, to lift said channels away from their respective conduits,- and a valve adapted to be opened during the feed of liquid to the bowl and to be closed when the collecting vessel is moved into open position, said valve being carried by the collecting vessel and positioned at the inlet end of the feed channel. In testimony of which invention, I have hereunto set my hand,- at' Stockholm, Sweden, on this 1st day of October, 1929.

KARL JOHAN SVENSSQN. 

